Oxyset Services
Industrial
thread135-111334 After reading this thread I wanted to add some basic information and ask for some help.
Pressure and contents in industrial gas cylinders is always calculated at 15 degrees C by the Industrial gas companies.
I am trying to work out the maximum withdrawal rate of LPG from different sized cylinders when used with oxygen/LPG equipment for cutting, brazing, and heating.
Usually for heating and cutting applications I would suggest the use of 45kg LPG cylinders with a "G" sized oxygen cylinder, but I have heard of people using 9kg and 18 kg LPG cylinders.
I would think this is dangerous because a lack of LPG pressure and flow could cause a flashback due to a lack of gas pressure and volume to keep the flame at the end of the tip or nozzle.
Here in Australia most cutting and heating tips use 100-150 kPa of LPG and anywhere between 200-1000 kPa of oxygen, depending on the size of the tip or nozzle.
From information gleaned from an LPG supplier here in Australia I have found out the maximum withdrawal rate from a 45kg cylinder is about 56.6 litres per minute, I am trying to find out the maximum withdrawal from a 9kg & 18kg cylinder at 15 degrees C.
Cylinders for LPG here go 4kg, 9kg, 18kg, 45kg, 190kg
The reason I ask this is due to the issue of withdrawal of acetylene from cylinders which is limited to 1/7th of the cylinder content per hour for intermittent use and 1/10th per hour for continuous use.
All oxygen/acetylene heating torches on the Aussie market grossly exceed the maximum withdrawal rate and often cause flashbacks, this is why I always recommend oxygen/LPG for heating over oxygen/acetylene even though the flame is colder, 2,850 degrees C v's 3,160 degrees C the heating tips for oxygen/LPG are much larger so the calorific energy available is much greater.
Can anyone out there help?
Pressure and contents in industrial gas cylinders is always calculated at 15 degrees C by the Industrial gas companies.
I am trying to work out the maximum withdrawal rate of LPG from different sized cylinders when used with oxygen/LPG equipment for cutting, brazing, and heating.
Usually for heating and cutting applications I would suggest the use of 45kg LPG cylinders with a "G" sized oxygen cylinder, but I have heard of people using 9kg and 18 kg LPG cylinders.
I would think this is dangerous because a lack of LPG pressure and flow could cause a flashback due to a lack of gas pressure and volume to keep the flame at the end of the tip or nozzle.
Here in Australia most cutting and heating tips use 100-150 kPa of LPG and anywhere between 200-1000 kPa of oxygen, depending on the size of the tip or nozzle.
From information gleaned from an LPG supplier here in Australia I have found out the maximum withdrawal rate from a 45kg cylinder is about 56.6 litres per minute, I am trying to find out the maximum withdrawal from a 9kg & 18kg cylinder at 15 degrees C.
Cylinders for LPG here go 4kg, 9kg, 18kg, 45kg, 190kg
The reason I ask this is due to the issue of withdrawal of acetylene from cylinders which is limited to 1/7th of the cylinder content per hour for intermittent use and 1/10th per hour for continuous use.
All oxygen/acetylene heating torches on the Aussie market grossly exceed the maximum withdrawal rate and often cause flashbacks, this is why I always recommend oxygen/LPG for heating over oxygen/acetylene even though the flame is colder, 2,850 degrees C v's 3,160 degrees C the heating tips for oxygen/LPG are much larger so the calorific energy available is much greater.
Can anyone out there help?